• Seal the coolant circuit after an EGR cooler delete. The plugs blank off the 17mm coolant ports left open when the cooler is removed.
• Billet aluminium. Machined, not cast, and not a hardware-store improvisation sitting in your cooling system.
• Set of two. One pair covers both ports on a typical cooler delete.
• No moving parts, no maintenance. Fit them, check them for leaks, forget about them.

• Isuzu 4JJ platform. Made for 4JJ EGR cooler delete setups running 17mm coolant ports.
• 17mm diameter. That is the number that matters. If your ports are not 17mm, these are not your plugs.

Measure before you order. EGR cooler and coolant line setups vary between 4JJ builds, and we are not going to guess yours for you. Confirm your coolant hose ID size is 17mm.

• Two HPD billet 17mm coolant blanking plugs.

Clamps, hoses and anything else your particular delete setup needs are not included.

• Fit to a cold engine. Never open a hot cooling system.
• Expect to lose some coolant. Have coolant on hand to top the system back up, and bleed it properly afterwards.
• Check for leaks at the plugs after the first heat cycle and again after the first decent drive. A slow coolant leak on a 4JJ is not something to sit on.

• Free express shipping Australia-wide, fully tracked.
• Dispatch: orders placed before 2 PM AEST on a business day go out the same day, subject to stock.
• Buy now, pay later: Afterpay, Humm, Klarna and Zip.
• All major credit cards accepted.

These plugs are one piece of an EGR cooler delete, not the whole job. They do not include the delete kit, gaskets or plates, and they do not make the rest of the job legal, tuned or finished.

EGR-related modifications can affect emissions compliance for road use. Parts like this are intended for off-road and motorsport applications. Know the rules that apply to your vehicle before you modify it.

Installation is a DIY job and is done at your own risk. If you are not confident working on a cooling system, have it fitted.

Q: Will these fit my 4JJ1 or 4JJ3?

A: They are made for 4JJ EGR cooler delete setups with 17mm coolant ports. Setups vary, so measure your ports or message us with your build before ordering and we will confirm it rather than have you guess.

Q: Is this a full EGR delete kit?

A: No. This is the pair of billet coolant blanking plugs only. The delete kit, blanking plates and gaskets are separate.

Q: Will these make more power?

A: No. They seal coolant ports. They make no power on their own.

Q: How many do I get?

A: Two. The $42 price is for the pair, not each.